Supply-valve for flush-tanks.



No- 846,132 I PATENTED MAR-*5, 1907.

R. MOGRAW.

SUPPLYVALVE FOR PLUSH TANKS.

APPLICATION FILED JUNE 4, 190a.

' a WITNESSES,

444 if H: p-

l I I I m: NCRRIS PETERS 6a., WASHINGTON, o, c

RHODA MoGRAW, OF SYRACUSE, NEW YORK.

SUPPLY-VALVE FOR FLUSH-TANKS.

No. 846,132. Specification of Letters Patent.

Application fil d June 4,1906. Serial No- 320,182.

E'atented March 5, 1907.

To a whom it may concern: 1 Be it known that I, RHoDA MoGRAw, of l Syracuse, in the county of Onondaga, in the 5 State of New York, have invented new and useful Improvements in Supply-Valves for Flush-Tanks, of which the following, taken vided with a float 10. The valve 4 and its seat, as 11, are inclosed within a suitable shell or water-chamber 12, having a flexible top or diaphragm 13 and a lateral extension or discharge-nozzle 14 of somewhat less crosssectional area than the supply-pipe 2, said in connection with the accompanying draw- I nozzle being provided with pressureregulaings, is a full, clear, and exact description. I tor valve 15, whereby the size of the water- This invention relates to certain improvepassage may be varied. to create a back presments in supply-valves for flush-tanks, in l sure'upon the diaphragm suflicient to resist which the water-supply is controlled by a the uplift upon the float during the inflow of suitable float. water to hold the valve 4 full open until the The essential object of this improvement is tank is practically filled. to cause the supply-valve to open and close The chamber 12 forms the inner terminus quickly, so that the water-supply is instantly of the water-inlet and is of greater cross-secfull on or full ofl,thereby preventingthe tional area than that of the water-supply passage of the water in fine jets between the pipe, and the diaphragm 13, which is impervalve and its seat and obviating the conseforate and impervious and forms the upper quent cutting or channeling-of the valve and side of the chamber 12, is also of considerably its seat and also avoiding the incidental singgreater area than the cross-sectional area of ing noise which usually accompanies the the valved inlet. It therefore follows that if gradual closing of the supply-valve. the valved outlet of the chamber 12 is re The invention lies in inclosing the valved stricted to less size than the inlet a back end of the supply-pipe in a chamber of compressure or uplift will be exerted upon the parativelylarge cross-sectional diameter havdiaphragm 13 to lift the latter, and thereby ing a diaphragm to which the main supplyhold the float down and valve 4 open, such valve and float is attached, and to provide back pressure being increased in proportion such chamber with a lateral discharge-nozzle to the degree of reduction of the size of the of less cross-sectional area than the main supoutlet relatively to the inlet and also in proply-passage and having a valve whereby the portion to the excess of area of the diacross-sectional area of the passage may be rephragm over that of the inlet, and it is this stricted more or less for the purpose of proconstricted discharge-passage, together with ducing a back pressure upon the diaphragm the magnified area of the diaphragm as resuflicient to hold the main valve open until lated to the inlet, which forms the essential overcome by the pressure of the water upon feature of my inventionviz., to hold the inthe float, whereupon the valve is instantly let-valve open against the lifting pressure of closed by the water-pressure in the tank actthe inflowing water acting on the float and ing upon said valve. tending to close the inlet-valve.

In the drawings, Figure 1 is a longitudinal The inner or lower side of the diaphragm sectional view of a flush-tank equipped with 13 is exposed to the inlet 2 and outlet 14, and my improved supply-valve, which is shown its upper side is exposed to the interior of the in elevation. Fig. 2 is an enlarged sectional view of a portion of the tank, showing the supply-valve in section.

The flush-tank, as 1, is provided with a supply-pipe 2 and a flush-pipe 3, the supplypipe terminating within the reservolr and is provided with a main valve 4, controlling the water-supply, while the flush-pipe 3 also terminates within the reservoir and is provided with a valve 5, controlling the exit of water from the tank or reservoir 1.

The valve 4 is mounted on the lower end of a stem 6, having its upper end pivotally attached at 7 to one end of a float-arm 8, which is fulcrumed at 9 and has its free end pro- 17, which forms a convenient means for securing the diaphragm to the lower section 12 and also serves as a baflie-plate to prevent forcible discharge of the inflowing water through and above the tank in case the diaphragm 13 should be broken or punctured.

T e discharge-passage 14 is always of less cross-sectional area than the inlet-passage 2, and the area of the diaphragm 13 is always greater than the crosssectional area of the inlet 2, the relative areas of said passages and diaphragm being proportioned according to the water-pressure per unit of area in the supply-pipe 2, thereby establishing a back main tank 1 through an opening 16 in a cap.

pressure upon the diaphragm su ['licient to rethe inlet having one of its sides provided with sist the uplift of the water 011 the float during the filling of the tank -to a predetermined level or until the uplift-pressure on the float reaches a predetermined degree, which is regulated by the relative size of the outlet 14 or valve 15.

As soon as the uplift-pressure of the float reaches such predetermined degree the back pressure upon the diaphragm is overcome and the accumulated uplift-pressure acting on the float instantly elevates said float and simultaneously closes the valve l, the closing action of the valve 4 being accelerated by reason of the fact that as soon as the valve begins to close the back pressure on the diaphragm and consequent resistance to the uplift of the float is at once reduced, allowing the water to lift the float with increased speed, thus causing the instantaneous closing of the inlet-valve 4.

The entire mechanism involved in this invention is located. within the main supplytank, and the essential elements are the diaphragm of greater area than the inlet and the restricted passage 14 of less area than that of the inlet, together with means, as the valve 15, for varying the size of the outlet and making it possible to use this invention with any waterpressure.

What I claim is-- 1. In combination with a flush-tank, a wa ter-supply pipe, a water-chamber connecting with the Water-supply pipe and provided with a lateral discharge, an adjustable valve in the discharge, a diaphragm forming one side of the chamber, a main valve attached to the diaphragm and coacting with the inlet to regulate the flow of water into said cham her, and a float attached to the diaphra m.

2. In combination with a flush-tank naving a valved Water-inlet, a chamber inclosing a flexible diaphragm of greater area than the cross-sectional area of the inlet, said chamber having a lateral discharge-passage of less cross-sectional area than the inlet, a valve for the inlet attached to the diaphragm, and a float also attached to said diaphragm.

3. A supply-valve for flush-tanks comprising a chamber having an inlet and an outlet of less cross-sectional area than the inlet, said chamber having a flexible impervious diaphragm at one side of the inlet and outlet and of greater area than the crosssectional area of the inlet, a valve for the inlet, and a float, both valve and float being attached to the diaphragm.

i. A water-supply valve for fiushtanks, comprising a water-chamber having an inlet and an outlet, the latter being oi less crosssectional area than the inlet, a valve for the inlet, an additional valve in the outlet, a diaphragm forming one side of the chamber and attached to the inletvalve, and having one side exposed to the inlet and outlet, and its other side exposed to interior of the tank, and a float attached to the diaphragm.

5. In combination with the flush-tank a water-supply chamber in the tank having an inlet and an outlet the latter being of less size than theinlet, a movable element forming one of the sides of the waterchamber, a valve for the inlet and a float, both valve and float being connected to said movable element, the latter being of greater area than the inlet, and means for varying the size of the outlet.

In witness whereof I have hereunto set my hand this 29th. day of May, 1906.

RHODA MOGRAW.

Witnesses:

H. E. Ci-IAsE, M. M. Now. 

